PayBay - World's First Offline Payment App using Bluetooth

Описание: In many parts of the world, especially rural and remote areas, people still rely heavily on cash for daily transactions due to unreliable internet access, poor network coverage, and limited availability of digital payment infrastructure. Traditional mobile payment systems often require internet connectivity, QR codes, or expensive hardware like card readers, which are not practical in these regions. This prevents millions from enjoying the convenience and security of digital payments, creating barriers to financial inclusion and economic growth. PayBay addresses this challenge by enabling people to send and receive money directly between smartphones using Bluetooth Low Energy (BLE), without the need for internet, QR codes, or additional hardware. It was designed for privacy and availability that replaces cash. Cash is offline, so does our app.

With PayBay, users can securely discover nearby devices and establish instant payment connections by simply entering a PIN. All transactions are encrypted and recorded locally on both devices, maintaining a secure ledger that protects user privacy. Unlike many mobile payment systems, PayBay works completely offline, making it ideal for areas with poor or no internet connectivity.

Whenever a device comes back online, PayBay safely syncs its transaction records with cloud payment gateways to update balances and prevent double-spending. The system is built with modern, low-cost technologies that run on nearly any smartphone, enabling small merchants, travelers, and everyday users to transact easily and securely without relying on expensive infrastructure.